Answer:
Solving for the Percent by Volume 
The v/v concentration of acetic acid in the stop bath is 24.6%. 
 
Explanation: 
 
To answer the question, we need to identify certain information stated in the question. Let us write down what’s given: 
 
Volume of solute = 160 mL 
Volume of solution = 650 mL 
Next, we need to determine what is required, in this case, the percent by volume. Now, let us look at the formula: 
 
v/v concentration = (solute volume / volume of the solution) * 100 
 
Solution: 
 
Percent by Volume = (160 / 650) * 100 
 
Percent by Volume = 0.2461538461538462 * 100 
 
Percent by Volume = 24.61538461538462 
 
Rounded off = 24.6% 
 
Therefore, the final answer is 24.6%
Step-by-step explanation: